/*
 *  Usage:
 *
      <div class="sk-wave">
        <div class="sk-rect sk-rect1"></div>
        <div class="sk-rect sk-rect2"></div>
        <div class="sk-rect sk-rect3"></div>
        <div class="sk-rect sk-rect4"></div>
        <div class="sk-rect sk-rect5"></div>
      </div>
 *
 */

@use "./utils.scss" as utils;
@use "./bootstrap_vars.scss" as bs;

$spinkit-spinner-margin: 40px auto !default;
$spinkit-size: 40px !default;
$spinkit-spinner-color: #333 !default;

.sk-wave {
  $rectCount: 5;
  $animationDuration: 1.2s;
  $delayRange: 0.4s;

  margin: $spinkit-spinner-margin;
  width: $spinkit-size * 1.25;
  height: $spinkit-size;
  text-align: center;
  font-size: 10px;

  .sk-rect {
    background-color: $spinkit-spinner-color;
    height: 100%;
    width: 6px;
    display: inline-block;
    animation: sk-waveStretchDelay $animationDuration infinite ease-in-out;
    @include utils.dark {
      background-color: bs.$body-secondary-color-dark;
    }
    &:not(:last-child) {
      margin-right: 0.3em;
    }
  }

  @for $i from 1 through $rectCount {
    .sk-rect#{$i} {
      animation-delay: -$animationDuration +
        calc($delayRange / ($rectCount - 1)) *
        ($i - 1);
    }
  }
}

@keyframes sk-waveStretchDelay {
  0%,
  40%,
  100% {
    transform: scaleY(0.4);
  }
  20% {
    transform: scaleY(1);
  }
}
